Sealing device for cold-chain logistics packaging box

Abstract

The utility model discloses a cold-chain logistics packing box sealing device which comprises a foam box, a net basket for preventing the foam box from being scratched is arranged outside the foam box, a fixing frame is fixed to the top of the net basket through screws, and a foam cover plate covers the top of the foam box. A sealing structure for pressing the foam cover plate is arranged at the top of the fixed frame; the net basket and the foam box are arranged to be of a mutual supporting structure, the net structure of the net basket effectively prevents the foam box from being scratched and damaged in the transportation process, meanwhile, the foam box provides internal support for the net basket, the net basket is prevented from being pressed and deformed, the foam box can be independently taken out of the net basket and is convenient to replace, and the foam box is convenient to use. The air bag and the top cover can be quickly disassembled and assembled through the magnetic attraction type detachable structure, and when the air bag is aged or damaged, the air bag can be replaced without a tool, and disassembly and replacement are quick.

Description

Technical Field

[0001] This utility model relates to the field of cold chain transportation technology, specifically to a sealing device for cold chain logistics packaging boxes. Background Technology

[0002] Cold chain transportation is most widely used in the food and pharmaceutical industries. Temperature-sensitive products such as fruits and vegetables, meat and poultry, seafood, dairy products, vaccines, blood products and biological agents all require low-temperature transportation to maintain their stability.

[0003] Currently, foam boxes are the most commonly used cold chain transport containers due to their low cost, lightweight nature, and good insulation, making them economical and practical. However, foam boxes are easily damaged, which can affect their sealing performance. A search revealed a patent application with publication number CN218142872U that discloses a sealing device for cold chain logistics packaging boxes. This device includes a sealed box containing a cold chain logistics box. A top cover is fitted over the top of the sealed box, and an inner locking component is connected to the top cover. The inner locking component includes a rubber sealing plate, which is interference-fitted into the top opening of the cold chain logistics box. An outer locking component, including a buckle, is located on the outer side of the bottom of the top cover and is hinged to the bottom edge of the top cover. The opening of the cold chain logistics box is sealed by a rubber sealing plate. The plate engages with the inner wall of the box as it moves. At the same time, the top block and the limiting plate engage with each other and work together with the plate to further reduce the chance of leakage and prevent the gas inside the box from coming into contact with the outside air, which could cause bacteria in the air to affect and spoil the goods.

[0004] Although the cold chain logistics packaging box can achieve the effect of preventing leakage, its complex structure will reduce the coordination of various components during the logistics transportation cycle. The jamming of parts will affect the use effect, and the airbag is not easy to replace after it is damaged. Utility Model Content

[0005] The purpose of this utility model is to provide a sealing device for packaging boxes in cold chain logistics. By setting a mesh basket on the outside of a traditional foam box to protect the foam box, the mesh basket improves the scratch resistance of the foam box, and the foam box provides internal support for the mesh, making the mesh basket less prone to deformation. The air bladder under the top cover is easy to replace by a simple magnetic attraction method. The simple structure makes it less prone to damage in logistics transportation with multiple cycles of use.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sealing device for packaging boxes in cold chain logistics, comprising a foam box, wherein a wire mesh basket is provided on the outside of the foam box to prevent the foam box from being scratched, a fixing frame is fixed to the top of the wire mesh basket by screws, a foam cover plate is covered on the top of the foam box, and a sealing structure for pressing the foam cover plate is provided on the top of the fixing frame.

[0007] The sealing structure includes a top cover, an airbag and a detachable structure for easy airbag replacement are provided below the top cover, and a fastening structure for fastening the top cover to the fixing frame is provided at the bottom of the top cover.

[0008] Preferably, the detachable structure includes a magnetic sheet, and a plastic frame for connecting the airbag and the top cover is glued to the upper surface of the airbag. An arc-shaped groove for inserting the plastic frame is opened on the lower surface of the top cover. The magnetic sheet is fixed to the inner wall of the arc-shaped groove and the upper surface of the plastic frame, and the two sets of magnetic sheets attract each other.

[0009] Preferably, the longitudinal section of the plastic frame is arc-shaped, the airbag is annular, and the lower surface of the airbag is in close contact with the foam cover.

[0010] Preferably, the fastening structure includes a rim, which is integrally formed on the upper surface of the fixing frame, and a groove is provided on the lower surface of the top cover, wherein a fastening structure is provided in the groove for the rim to be engaged in the groove.

[0011] Preferably, the snap-fit ​​structure includes a first protruding edge, which is integrally formed on both sides of the inner wall of the groove, and a second protruding edge is integrally formed on both sides of the surrounding edge, with the lower surface of the second protruding edge closely attached to the upper surface of the first protruding edge.

[0012] Preferably, the foam cover includes a cover body and an extension edge, the extension edge being integrally formed at the bottom of the cover body, and the outer wall of the extension edge being fitted to the inner wall of the foam box.

[0013] Preferably, the wire mesh basket includes a wire mesh panel, and one side of the wire mesh panel is welded with crisscrossing reinforcing ribs.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model sets the wire mesh basket and foam box as an interdependent structure: the wire mesh structure of the wire mesh basket effectively prevents the foam box from being scratched and damaged during transportation, while the foam box provides internal support for the wire mesh basket to prevent the wire mesh basket from being deformed by pressure. The foam box can be taken out separately from the wire mesh basket for easy replacement, so that foam boxes with different foam structures can be used.

[0016] 2. The airbag and top cover are quickly attached and detached via a magnetic detachable structure. When the airbag ages or is damaged, it can be replaced without tools, making replacement quick and easy. The annular airbag fits tightly with the foam cover, and uniform pressure is applied when the top cover is fastened to enhance the seal, which helps to isolate external temperature interference.

[0017] 3. By setting up a snap-fit ​​structure, the edge automatically aligns with the groove when snapping, and the top cover and the fixed frame can be locked with a single press. The structure is simple and not easily damaged, and is especially suitable for repeated use in logistics transportation. Attached Figure Description

[0018] Figure 1 This is an exploded view of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the wire mesh basket of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the foam cover plate of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the bottom of the top cover of this utility model;

[0022] Figure 5 This is a schematic diagram of the snap-fit ​​structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the mesh sheet of this utility model.

[0024] In the diagram: 1. Foam box; 2. Wire mesh basket; 3. Fixing frame; 4. Foam cover; 5. Fastening structure; 6. Top cover; 7. Airbag; 8. Detachable structure; 801. Magnetic sheet; 802. Plastic frame; 803. Arc groove; 501. Edge; 502. Groove; 9. Snap-fit ​​structure; 901. First convex edge; 902. Second convex edge; 401. Cover body; 402. Extension edge; 201. Wire mesh; 202. Reinforcing rib. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-6 This utility model provides a technical solution: a sealing device for packaging boxes in cold chain logistics, including a foam box 1, a wire mesh basket 2 to prevent the foam box 1 from being scratched, a fixing frame 3 to be fixed to the top of the wire mesh basket 2 by screws, a foam cover plate 4 to be covered on the top of the foam box 1, and a sealing structure to press the foam cover plate 4 to the top of the fixing frame 3.

[0027] The sealing structure includes a top cover 6, an airbag 7 and a detachable structure 8 for easy replacement of the airbag 7 are provided below the top cover 6, and a fastening structure 5 for fastening the top cover 6 to the fixing frame 3 is provided at the bottom of the top cover 6.

[0028] The wire mesh basket 2, serving as the outer protective layer, is constructed of stainless steel. The fixing frame 3, made of wear-resistant engineering plastic, is secured to the top of the wire mesh basket 2 with screws. The mesh structure of the wire mesh basket 2 reduces direct friction with the foam box 1, while the foam box 1 provides internal support for the wire mesh basket 2. Under pressure, the foam box 1 provides support and prevents deformation of the wire mesh basket 2. Furthermore, the design of the wire mesh basket 2 allows the foam box 1 to be removed, eliminating the need to replace the entire device when changing to a foam box 1 with a different internal structure. Different internal structures of the foam box 1 refer to foam grooves adapted to the size of the fruits and vegetables when the foam box 1 is used to transport them. Therefore, this sealing structure and the wire mesh basket 2 are compatible with foam boxes 1 of the same external shape and size, without limiting the internal structure of the foam box 1, thus expanding its applicability.

[0029] The detachable structure 8 includes a magnetic piece 801. A plastic frame 802 for connecting the airbag 7 and the top cover 6 is glued to the upper surface of the airbag 7. An arc-shaped groove 803 for inserting the plastic frame 802 is opened on the lower surface of the top cover 6. The magnetic pieces 801 are fixed to the inner wall of the arc-shaped groove 803 and the upper surface of the plastic frame 802 respectively, and the two sets of magnetic pieces 801 attract each other.

[0030] By setting up the magnet 801, the airbag 7 can be easily replaced when it ages without tools, and there will be no problems with the parts not fitting properly or affecting its use due to repeated use during transportation.

[0031] The longitudinal section of the plastic frame 802 is arc-shaped, the airbag 7 is annular, and the lower surface of the airbag 7 is in close contact with the foam cover plate 4.

[0032] The fastening structure 5 includes a rim 501, which is integrally formed on the upper surface of the fixed frame 3. The lower surface of the top cover 6 has a groove 502, and a fastening structure 9 is provided in the groove 502 for the rim 501 to be engaged in the groove 502.

[0033] The circumference 501 of the fastening structure 5 automatically aligns with the groove 502, locking with a single press, suitable for cyclical use in logistics. When the top cover 6 is pressed down, the circumference 501 inserts into the groove 502. The first protruding edge 901 on both sides of the groove 502 and the second protruding edge 902 on both sides of the circumference 501 adopt a hook-like structure. When the top cover 6 is pressed down once, the second protruding edge 902 slides along the curved surface of the first protruding edge 901 until it crosses the critical point, and then rebounds and locks under the elasticity of the material, forming a self-locking mechanism. This process can be completed with only one vertical force application, without the need for rotation or multiple operations. The contact surface of the protruding edge is made of wear-resistant engineering plastic, maintaining locking reliability even with frequent opening and closing. The enclosing design of the circumference 501 and the groove 502 effectively disperses the impact of transportation vibration on the locking point, reducing the risk of structural fatigue, making it particularly suitable for high-frequency cyclical use scenarios in cold chain logistics.

[0034] The snap-fit ​​structure 9 includes a first protruding edge 901, which is integrally formed on both sides of the inner wall of the groove 502. Both sides of the perimeter 501 are provided with an integrally formed second protruding edge 902, and the lower surface of the second protruding edge 902 is in close contact with the upper surface of the first protruding edge 901.

[0035] The foam cover 4 includes a cover body 401 and an extension edge 402. The extension edge 402 is integrally formed at the bottom of the cover body 401, and the outer wall of the extension edge 402 is fitted to the inner wall of the foam box 1. The extension edge 402 is inserted into the inner wall of the foam box 1 to form a labyrinth seal, which, together with the downward pressure of the airbag 7, enhances the lateral airtightness.

[0036] The wire mesh basket 2 includes a wire mesh panel 201, on one side of which are welded crisscrossing reinforcing ribs 202. The welded reinforcing ribs 202 form a grid truss structure, which reduces the overall weight while increasing the bending strength, ensuring that the wire mesh basket 2 does not deform when stacked under stress.

[0037] When in use, when the top cover 6 is pressed down, the edge 501 is inserted into the groove 502. The first protruding edge 901 on both sides of the groove 502 and the second protruding edge 902 on both sides of the edge 501 adopt a hook-type structure. When the top cover 6 is pressed once, the second protruding edge 902 slides along the curved surface of the first protruding edge 901 until it crosses the critical point. Then, under the action of material elasticity, it rebounds and locks, forming a self-locking mechanism. After the top cover 6 is pressed tightly against the fixing frame 3, the annular airbag 7 covers the entire perimeter of the cover plate, improving the sealing performance.

[0038] Compared to traditional sealed boxes used in cold chain transportation, this device has a simpler structure, is less prone to damage, has greater applicability, lower cost, and is more suitable for cyclical transportation in logistics.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing device for cold chain logistics packaging boxes, characterized in that: Includes a foam box (1), the outside of which is provided with a wire mesh basket (2) to prevent the foam box (1) from being scratched, the top of the wire mesh basket (2) is fixed with a fixing frame (3) by screws, the top of the foam box (1) is covered with a foam cover plate (4), and the top of the fixing frame (3) is provided with a sealing structure to press the foam cover plate (4). The sealing structure includes a top cover (6), an airbag (7) is provided below the top cover (6), and a detachable structure (8) is provided for easy replacement of the airbag (7). A fastening structure (5) is provided at the bottom of the top cover (6) for fastening the top cover (6) and the fixing frame (3).

2. The sealing device for cold chain logistics packaging boxes according to claim 1, characterized in that: The detachable structure (8) includes a magnet (801). The upper surface of the airbag (7) is glued with a plastic frame (802) for connecting the airbag (7) and the top cover (6). The lower surface of the top cover (6) is provided with an arc-shaped groove (803) for the plastic frame (802) to be placed. The magnet (801) is fixed to the inner wall of the arc-shaped groove (803) and the upper surface of the plastic frame (802), respectively. The two sets of magnets (801) attract each other.

3. A sealing device for cold chain logistics packaging boxes according to claim 2, characterized in that: The longitudinal section of the plastic frame (802) is arc-shaped, the airbag (7) is annular, and the lower surface of the airbag (7) is in close contact with the foam cover plate (4).

4. A sealing device for cold chain logistics packaging boxes according to claim 3, characterized in that: The fastening structure (5) includes a rim (501), which is integrally formed on the upper surface of the fixed frame (3). The lower surface of the top cover (6) is provided with a groove (502), and a fastening structure (9) is provided in the groove (502) for the rim (501) to be fastened in the groove (502).

5. A sealing device for cold chain logistics packaging boxes according to claim 4, characterized in that: The snap-fit ​​structure (9) includes a first protruding edge (901), which is integrally formed on both sides of the inner wall of the groove (502). Both sides of the surrounding edge (501) are provided with an integrally formed second protruding edge (902), and the lower surface of the second protruding edge (902) is close to the upper surface of the first protruding edge (901).

6. A sealing device for cold chain logistics packaging boxes according to claim 1, characterized in that: The foam cover (4) includes a cover body (401) and an extension edge (402). The extension edge (402) is integrally formed at the bottom of the cover body (401), and the outer wall of the extension edge (402) is attached to the inner wall of the foam box (1).

7. A sealing device for cold chain logistics packaging boxes according to claim 1, characterized in that: The wire mesh basket (2) includes a mesh panel (201), and one side of the mesh panel (201) is welded with intersecting reinforcing ribs (202).

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